#include <stdio.h>

int main(void)
{
  const int ROWS=6;
  const int CHARS=6;

  int row;
  char ch;

  for(row = 0;row <ROWS;row++)
  {
    for (ch=('A'+row);ch<('A'+CHARS);ch++)
    {
      printf("%c",ch );
    }
    printf("\n");
  }
  return 0;
}